提高在线同位素分离器分离效率的实验研究

The Experimental Study for Increasing Efficiency of On-Line Isotope Separator

描述了兰州在线同位素分离器的最新进展 .利用FEBIAD离子源 (受迫电子引起的弧放电源 )开展了中、低能在线实验 .在线同位素分离器的质量分辨本领达到 50 0— 70 0 ;Kr和Xe的离线分离总效率分别达到 3 1 %和 4 5% ;10 4In , 10 4Ag,10 4Gd的在线分离总效率达到 1 %— 2 % ;Hg的在线分离总效率达到 5% .成功地实现了对In ,Ag,Gd ,Hg ,Rn ,At等一系列元素的同位素分离 .

The progress and the on-line experimental results of isotope separator on-line in Lanzhou(ISOLAN) by using the low and the medium energy beams are described. The resolving power of ISOLAN is obtained to be 500\_700 for Xe by using FEBIAD ion source. The off-line overall efficiency is 3.1% for Krypton and 4.5% for Xenon. The on-line overall efficiency is 1.5%\_ 2.0% for 104In, 104Ag and 104Gd,and 5% for 199Hg. The isotopes of Hg,At and Rn produced in the bombardment of natural lead targets with 18O beam at 30MeV/u were successfully separated by ISOLAN. The highest energy of 1.234 MeV of γ-ray originated from the decay of 208Hg with a production cross-section of 5μb was observed.